活性炭纤维负载型纳米铁的制备与去除水体中六价铬的研究

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1、南开大学硕士学位论文活性炭纤维负载型纳米铁的制备与去除水体中六价铬的研究姓名：汪帅马申请学位级别：硕士专业：环境工程指导教师：金朝晖20090501中文摘要通纳米铁；活性炭纤维上负载的纳米铁活性要高于普通的纳米铁，并且活性炭纤维对水中的Cr(VI)有吸附作用。地表水中的Ca2+、M92+会降低性炭纤维负载型纳米铁对Cr(VI)的去除效果。活性炭纤维负载型纳米铁经过真空干燥稳定化处理后，对cr(VI)的去除效果略有下降。4．活性炭纤维负载型纳米铁对Cr(VI)的去除是纳米铁和活性炭纤维共同作用的结果。铁和Cr(VI)反应

2、后以铁氧体的形式沉淀出来从而将Cr(VI)从水体中去除。同时，活性炭纤维也吸附了一部分Cr(VI)，从而达到联合去除水体中Cr(VI)的目的。关键词：水体污染活性炭纤维纳米铁六价铬(cr(VI))IIAbstractWateriSoneofthemostvitalresourcesforhumanbeingsanddevelopmentofthesociety．Asrapiddevelopmentofindustryandeconomy,Chinanowconfrontedthechallengeofwatershor

3、tageandpollution．ChromiumisavitalindustrialmaterialforthereiSnoreadysubstitute．1rIle、矶deutilizationofchromiumandwithoutproperdisposalthewastes，variouschromiunlcompoundswerereleasedtoenvironmentresultingincontaminationofchromiuminwater．Thetreatmentmethodsofheavym

4、etalsinwaterCanbeclassifiedasphysicochemicaltreatment，chemicaltreatmentandbiologicaltreatmentmethod．Becauseofthe、柝desourceandlowcost,ironattractedlotsofattentions．However,ironfilingsandironpowdersreacted诚tllpollutantsatarelativelowspeed，andtheironmaterialsCannot

5、beutilizedefficiently．Inthepastdecade，nanoscalezero-valentiron(NZVI)hasattractedgrowingattentionintherealmofpollutantsremovalbecauseitslargespecificsurfacealgaandhighreactionactivity．LotsofmethodsCanbeusedtosynthesisNZVI．Hereweutilizedwatersolutionmethodtosynthe

6、sisNZVIandloadedNZVIonactivatedcarbonfiber(ACF)．ACF-NZVIWasemployedfortheCr(VI)inwater．111eobjectiveofthisstudyWastopreparetheACF-NZVIandoptimizethesynthesisconditions．Moreover,ACF-NZVIWasevaluatedtoremoveCr(VI)pollutantsinwater，andalsothemechanismoftheCr(VI)rem

7、ovalWasinvestigated．111cmajorworkCanbeclassifiedasfourpartslistedasfollows：1．OptimizesynthesisconditionsofACF二NZVI：undertheN2atmosphere，FeS04·7HzOandKBH4wereselectedforthesynthesisofNZVI．O．159FeS04。7H20wasdissolvedin12．5mLD1water，thenadded17．5mLC2HsOH．nemassofAC

8、FWascalculatedas20％(Fe／ACF-NZVI)．ThepHofthesolutionWasadjustedto6．5beforethereactionandthemassofK13HaWastwotimesofstoichiometricamounts．KB地solutionWasaddedataspeedof2